— Air quality in our city is becoming worse and worse.—Yes. These days' PM2.5 readings are frightening. We must do something to ______air pollution.
#55017
A
reduce
B
remove
C
collect
D
gather
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The water is too hot. We’d better right now.
#62375
A
not to drink
B
don’ t drink
C
not drink
D
drink not
Be sure _______ when you enter the cave. Otherwise, you’ll hit your head on the rocks.
#53929
A
to bend
B
bends
C
will bend
D
bending